Mining apparatus with cleanup



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Oct. 12, 1954 K. E. MCELHATTAN 2,691,513

MINING APPARATUS WITH CLEANUP P:ad July 2. i949 5 SheetsSheet 4 Oct. 12,1954 K. E. MCELHATTAN MINING APPARATUS wrm CLEANUP 5 Sheets-Sheet 5Filed July 2. 1949 Eig/Q All L lllllll Patented Oct. 12, 1954 UNITEDASTAT-*ES PATENT 'DFFI'CE `Kenton Eugene McElhattan, Franklin, Pa., as-

signor `to Joy Manufacturing Company, -Pitts burgh, Pa., a corporationof yPennsylvania,

Application July 2, 1949,-Serial No. 102,796

11 Claims. 1

My invention relates to Vmining apparatus: and more particularly tomining apparatus of 'the so-called continuous miner ftype.

,Continuous miners are-apparatus for mining .coal or other mineral fromseams or veins ina relatively continuous process, effecting adisintegration of the seam or vein and-the removal of the coal orother-mineral detached-from the .scam or vein and delivering itto altransport system, all without Iintervening handling by manpower.

In a form of continuous miner which has recently come upon the marketthere is incorporated a tractor-supported base upon which a turntable ismounted for vrotation upon avertical axis. This turntable has on itmeans for disintegrating a mineral vein, means for reoeiving thematerial detached from the-mineral vein andcarrying it backward, andr`means for .related generally horizontal paths .and ya .dis-

integrating apparatus per se mounted on said frame for swinging movementabout a horizontal axis perpendicular to the path of reciprocation. Thisdisintegrating apparatus includes a plurality of series of orbtallymoving disintegrating elements traveling in similar elongated orbits andsospaced as to tear loose the mineral which they attack over asubstantial widthon the order, say, of two to three feet. Thedisintegrating apparatus vis swingable upwardly at its forward end aboutthe horizontal axis mentioned and-may be sumped and withdrawn, and maybe driven by power provided by motor means so supported as to be rotatedupon rotation of the turntable, and so connected with the disintegratingapparatus that the .sumping and withdrawing movements of the latterandvthe vertical swinging movements of the latter will notlinterruptthedrive'of thedisintegrating elements. The disintegrating apparatus is 1provided with hydraulic 'feeding and retracting cylinders and withhydraulic upswing cylinders, and a cycle of operation applied 'to asingle vertical band of coal or other mineralincludes, desirably, asumping, entering attack on the coal or other mineral, a verticalupswinging :movement during which usually the largest partici ythe coalin a particular'band is `torn-loose from "the face, and nally aretractivemovementduring which a roof generally parallel to the mineriioor vis formed. The coal or :other mineral :.-is torn from theffaceand vdisintegrated, and =most of it is carried :by the disintegratingAelements rearwardly along the top :of the disintegrating mechanism andVdelivered to a front receiving conveyor vwhichconveys it :back to ahopper, in the -Well known Aform of apparatus mentioned, fromwhichrhopper thematerial iszdelivered vto a desired vdischarge point Aby1a rear -conveyor. Successive vvertical bands :are removed across :a-face until 4the full width has been covered, and fthen another layer,soto speak, -is progressiveyly mined out by the disintegration fof its4constituent vertical zbands.

These machines, when operating fin; many coal mines, need :clamp cleanupdevices, because -bug dust and some lumps, instead of being -dischargedto the delivery'point of ythe machine, reach Athe -mine =loor -Iinsubstantial quantity. This need may, of course, exist in the mining ofother minerals. :Some coal may escapetat the partially -open side of theupright bands undergoing disintegration; some is ydetached with suchforcethat itis thrownor/bounces out of the front receiving conveyor,and-some: escapes downwardly through thespaoes-between thedisintegrating elements as lthese are sweeping through the generallyupwardly `directed arcuate portions of theirtravel at the ,forward vendof the Vdisintegrating apparatus. lIn fany event, enoughA coal-mostlyrlines-escapes to the lmine floor to presenta jnumber .of A.problems orcomplications whichfmake the cleaning up of the Ybottom bothfdesirableand worthwhile. While .the -ne material on the ,ioor ismore expensive to clean than the average material that v.goes over vtheyminer-conveyors it is of .real `value, vand unless it is, loadedandtaken out of-the mine .it represents -a denite gloss.

Such material increasesre anddust explosion hazards, .andvitisdifficultand expensive to vattempt by rockA dustingto` obviatethesedangers.

fA layer of loosamateri-al onthefloor. interferes :with settingprops,as'the coalhasato be-shoveled aside so the props can be rmly supportedbnlthe .-iioor. vAnd ',the y.coal .displaced in setting props may, sinceit is;likely ,to beshoveledin frontof the operatorgvnotonl-y addtofthediscomfort of vthe operator, :but actually fmake things moreunsafe for him in the event=quick movement may be necessary.

From the :standpoint I-of -actual ,operation of Vthe miner, ifthe'bug-fdustsbe not removed, there will be more frequentpneed foradjustment-of l,the lower `limit fior the,A disintegrating apparatus,

as the level of the surface over which the ma- 3 chine moves will changewith the thickness of the unremoved layer of coal. There will be a lessstable foundation for the machine as it attacks the face; and,especially in low seams, it may be impracticable to use machines whichcould otherwise have been employed.

For all these, and perhaps other, reasons, it is highly desirable thatprovision be made to clean up the loose coal or other material from themine bottom and effect its delivery with the other and main portions ofthe disintegrated product.

An object of the present invention is to provide an improved miningapparatus. Another object of the invention is to provide an improvedmining apparatus including improved means for effecting the cleaning upfrom the mine floor of any material detached from a seam or vein andwhich may escape to the mine floor. A further object of my invention isto provide an improved mechanism for moving loose coal or otherdisintegrated mineral on a mine bottom into the range of operation of anapparatus which will pick it up from the floor and deliver it to adesired point. Still another object of my invention is to provide animproved floor-cleaning arrangement including a loose material-pushingapparatus operatively connected with a moving part of a mining apparatusfor actuation by the latter. A further object is to provide an improvedmining apparatus in which a loose material-pushing apparatus isoperatively connected with the veinattacking apparatus of the miningapparatus in such a manner and by such means as not only to move thematerial of which it changes the position on the mine floor, into thereach of the veinattacking apparatus, but also as to be moved out ofpossible interference with the vein-attacking apparatus as thevein-attacking apparatus is moved in a direction to increase itsproximity to the loose material-pushing apparatus. A further object ofthe invention is to provide an improved adjustable material movingapparatus. Yet a further object of the invention is to provide animproved disintegrating and floor cleaning `arrangement for a miningapparatus including a distinegrating structure, a structure for movingloose material on the mine bottom within the reach of thedistintegrating structure, and an improved interconnecting linkage forcoordinating -the relative movements of the two structures.

Other objects and advantages of the invention will hereinafter morefully appear.

In the accompanying drawings, in which one illustrative embodiment whichthe invention may assume in practice is shown for purposes ofillustration,

Figs. l and 2 are, respectively, top plan and side elevational views ofthe forward end of a continuous miner in which my invention from itsvarious aspects is incorporated.

Fig. 3 is an enlarged fragmentary vertical section on the plane of theline 3-3 of Fig. l.

Fig. 4 is a sectional view approximately on the plane of the line 4-4 ofFig. 3 but on a reduced scale.

Fig. 5 is an enlarged vertical sectional view on the plane of the line5-5 of Fig. 4.

Fig. 6 is an enlarged transverse fragmentary sectional view on the planeof the line 6-6 of 'Fig 5.

Fig. 8 shows the structure of Fig. 'I in a different position, thedisintegrating apparatus being shown in a position which it would notordinarily assume in practice, this position being illustrated only forthe purpose of showing the maximum downward movement possible for thedisintegrating apparatus.

Fig. 9 is a similar view showing the disintegrating apparatus inelevated position and about to make a withdrawal movement.

Fig. l0 is a similar view showing the distintegrating apparatus about tostart a sumping operation, and with the small amount of residualmaterial on the mine floor in the position to which it had beenpreviously moved forward by the pusher mechanism forming a portion ofthe invention.

Fig. 1l is a view showing a portion of the hydraulic system of theapparatus.

Referring to the drawings, and rst to Figs. 1, 2 and 3 thereof, it willbe observed that I have shown at I a mining apparatus of the so-calledcontinuous miner type. This includes a base 2 adapted to be transportedby power driven tractor tread devices 3 and carrying a turntable 4 whichmay be rotated on a vertical axis 5 by a horizontally rotative forceapplying means 6. The turntable 4 carries a pair of motors 1, 'I instationary relation to it, and has guideways 8, 8 in which there isreciprocable, radially of the turntable, a frame 9 which pivotallysupports, for swinging movement in vertical planes about a transverseaxis I0, a distintegrating mechanism II, which includes a plurality ofdisintegrating elements I2, herein shown as supported by circulatingchains I3 guided for movement in closed orbits on a built-up barstructure I4 (see Fig. 3). The chains I3 are driven by sprockets I6carried by a splined shaft Il', which is driven by gearing (not shown)housed in gear boxes I8 supported by the sliding frame 9, power beingdelivered to the gearing in these gear boxes by telescopic shafts 2Udriven by the motors 'I. The distintegrating apparatus discharges to afront conveyor 22 of the flight type, and this conveyor is driven fromone of the motors 'I through extensible transmission mechanism 23. Thefront conveyor 22 discharges into a hopper 24 from which a suitabledelivery conveyor 25, of which only the forward portion is shown,delivers the material to a desired point rearwardly of the apparatus.

The disintegrating apparatus Ii is adapted to be swung vertically bypower supplied by a pair of upswing cylinder and piston mechanisms 21secured, as at 28, to the bottom of the reciprocable frame 9, and theframe I4 has at its opposite sides depending, rearwardly extending arms29 pivotally connected at their inner ends, as at 3G, to pitmans Sisecured to the pistons 32 of the cylinder and piston mechanisms 21, andadapted to be moved forwardly by hydraulic fluid supplied under suitablecontrol, and to be returned, upon venting of the fluid, by the weight ofthe disintegrating apparatus.

As so far described, the apparatus is essentially the same as thatdisclosed in the John R. Sibley application, Serial No. 47,422, iiledSeptember 2, 1948 which, following the filing of a continuation-in-partapplication, Serial No. 102,996 on July 5, 1949, has now becomeabandoned, the John R. Sibley application and this application having acommon assignee. It is believed unnecessary to show and describe thestructure thus brieiiy adverted to in any more detail, but if furtherdescription is desired, it may be had by ref- The recprocable frame 9includes a material -receiving trough structure at whose bottom there isarranged a forwardly sloping deck plate 4l over Awhich the fiights 42 ofthe front conveyor -2`2 move rearwardly; thereturn run of this conveyorpasses over a lower deck plate 43. The trough structure 40 supports atransversely extending idler roller for the front conveyor 22; and,pivotally supported on the trough structure-40 for swinging about ahorizontal axis in the same straight line with the axis of the idler.roller 45, which axis is indicated at 4S, there is a frame 4'!including a pair of rearwardly extending ear elements 48, a transverseplate element 49, forwardly extending side plate elements 59, bottomreinforcing structure 5i, and a top plate 52 having its forward portion53 more steeply .forwardly inclined than its rearward portion 54. Thissuitably reinforced structure carries a, rearwardly projecting portion56, between the ears 5l on which there extends a pin 53 to which thereis suitably pivotally connected at 59y the piston rod 60 of a tiltcylinder and piston mechanism 6l supported at its other end, as at 62,on ear structure 63 depending from the bottom deck plate 43. Thecylinder and piston mechanism 6| is single acting, and the admission offluid to its rearward end swings the forward end of the structure 4lupwardly about the axis 4S.

The side plates have suitably secured to them gibs 65 spaced apart oneabove the other, there being a pair of gibs at either side of thestructure 4l. Suitably slotted guide bars G5 are reciprocable betweenthe gibs and guided by them for longitudinal reciprocation. These guidebars are attached at their forwards ends, herein through an angle platemember 1D, to a relatively wide pusher element 'll of boxlikeconstruction and having a forward sloping pusher wall '12. Theconnection between the pusher structure il and the guide bars 56 isherein shown as a rigid one, but it will be readily understood that astructure which would permit the pusher element i Il to swing upwardlyas it was retracted, so that it might pass easily over any material thatmight be behind it, might readily be adopted. All that would benecessary would be to provide a pivotal connection between the forwardedge of the horizontal portion of the `angle '10 and the top of thepusher structure 1| and to remove the bolted' connections between thepusher structure and this angle which are shown in the present drawing.

It will also be noted that if fluid under pressure is not being suppliedto the cylinder and piston mechanism 6| the resistance encountered bythe heel of the pusher element ll may kick the structure 41 upwardly andallow the pusher element to pass over any material on the mine bottom oroor, particularly if the rearward side of the pusher element be suitablybeveled.

It is desirable that the pusher element ll be advanced at a time whenthe disintegrating apparatus cannot have its disintegrating elementssnag the pusher structure. It is also desirable that means be providedfor pushing the pusher element 'H forward in every position of attack ofthe disintegrating mechanism across the face, thus causing the pusherelement to clear the mine floor within its path of movement and to moveany loose material within its path of travel forwardly into a positionwhere it will be picked up bythe lower, forwardly moving runs of thedis- 6 integrating chains i3 fand `carried up around `"the forward endof 'the orbits of these chains rand then rearwardly along the tops ofthe chains, and Vbe discharged onto'the conveyor 22 and thus be carriedoff to a desired pointof delivery.

These desirable results are accomplished by arranging appropriateconnections .between the disintegrating apparatus Il and `the pushermechanism whereby during upswing of the disintegrating apparatusthewpusher mechanism will be advanced and during downswing of thedisintegrating apparatus the pusher element 1I will be retracted. Thisis accomplished `by the provision of rigid rearward extension bars I5welded or otherwise suitably connected to the arms 29, and pivotallyconnecting these rearward extension arms, as at T6, to Vforwardlyextending links l1 whose forward ends are pivotally .connected, as ati3, with ears 19, x'edly secured to the tops of the guide bars 5t nearthe forward ends of the latter. ln this arrangement it will `beappreciated at once that as the disintegrating apparatus I l is swungupwardly the points 'I6 will be swung in an arc of relatively flatcurvature from a point to the rear of a verticaltransverse planeincluding the axis lll, to another point-forwardly of such plane, thedistance of these points apart being sufficient to provide thedesired-forward movement of the pusher element ll. C'orrespondingly, ondown swing of the disintegrating apparatus Il, the pivotal connection itlwill be swung rearwardly from a position well forward of the 4axis I0,as illustrated for example in Fig. 9, to a position to the rear of thevertical plane mentioned, and thus retract the bars 66 through arelatively long stroke.

The mode of operation of the clean-up apparatus will be readilyunderstood from what has been stated. Fig. l0 shows the disintegratingapparatus about to be sumped into a vein as the rst step in the removalof a vertical band of material therefrom. It will be noted that therewas brought into the reach of the disintegrating elements I2 asubstantial heap of bug dust through the preceding forward movement ofthe pusher element 1l. This is largely removed as the disintegratingapparatus, with iis disintegrating elements moving orbitally, is loweredinto sumping position. As a sumping operation takes place, the pusherelement remains on the mine bottom but is advanced with thedisintegrating apparatus and will push ahead of it any material itencounters. As the disintegrating apparatus starts its upward movementand material either drops between the disintegrating elements, or forother reasons falls downwardly, this material, plus any other materialwhich has fallen within the path of forward movement of the pusherelement l l, will be thrust forward into a position where it may becleaned up by the disintegrating apparatus when the latter again removesa segment of mineral in the same general relation to the center line ofthe room or entry. As the disintegrating apparatus Il moves up, thepivotal connection 16 moves forward, thrusting the links l1 forward andthereby thrusting the bars 66 and the pusher element 'll forwardly. Atthe end of the upswinging movement, as represented in Fig. 9, the pusherelement 'H has moved as far forwardly as is possible relative to thethen stationary base 2 of the apparatus as a whole. As the withdrawingmovement of the disintegrating apparatus takes place and as thedisintegrating mechanism is swung back down, after the withdrawingmovementvhas been completed, the pusher element will be retracted, firstdue to the retractive movement of the frame 9 and then due to therearward movement of the bars G6 under the pull of the links 1l. It willthus be seen that each time the disintegrating mechanism is sumped in,the pusher element will be advanced concurrently and at a like rate withthe disintegrating mechanism, and that as the disintegrating mechanismis swung upwardly the pusher element will be further advanced and thusmove the loose material in its path forwardly. The cumulative forwardmovement may be on the order of a yard for a sumping movement ofeighteen inches, in a mine of substantial height.

In Fig. l1, there is shown in simple form a hydraulic system suited forthe control of the apparatus for eiecting clean-up of the mine oor. Noeffort has been made in this figure to show any more than will suiice todisclose the control of sumping and withdrawing, the supply and ventingof fluid from the cylinder and piston mechanism 6I, and the supply andventing of fluid from the upswing-effecting cylinder and piston devices21.

The sumping and withdrawing cylinders, for effecting sumping andretraction of the disintegrating apparatus and of the clean-upmechanism, are shown at B5, 85 in the diagram of Fig. l1, and one ofthem is also shown in part in Fig. 3. These are double acting cylinders,since they both advance and retract the disintegrating mechanism and theclean-up or pusher mechanism. They are connected together at theiropposite ends by cross connections 86 and 81. A conduit 8S serves tosupply iiuid to the front ends of the cylinders 85 through theconnection 81, and a conduit 89 serves to supply fluid to the rearwardends of the cylinders 85 through the cross connection 86. A connection9| is adapted to supply fluid through branch connections 92, 92 to theupswing cylinders 2T. A relief valve 93 is adapted, upon a developmentof excessive pressure within the cylinders l-as, for example, in theevent of a roof fallto permit the venting of fluid through a reliefconnection 94 to a general return conduit 95, which leads from a valvebox structure 96 and serves for the discharge of uid from the valve boxstructure back to a tank or reservoir 98. A suitably driven pump 99draws liquid from the reservoid 98 via a conduit and delivers it througha conduit |0| to the supply box |02 of the valve box structurke 96. Thebox section |04 of the valve box structure has the return line 95connected to it, and a conduit |06 serves for the supply of fluid to acylinder and piston mechanism 6|, and for the venting of fluid from thelatter.

Shown as parts of the valve box structure 90 are three valve units |08,|09 and |0. These are of conventional form and the first two simplycontrol the supply of fluid to and the venting of fluid from the singleacting cylinder and piston mechanism 6I and the pair of single actingcylinder and piston mechanisms 2l'. The unit H0 controls the supply ofuid selectively to the conduits 83 and 89, and the venting of luid fromthese conduits. The structure of the units being conventional and beingcapable of side modication, it will suflice simply to mention that eachhas for its valve an operating stem, and that these stems are designated||2 and H3 for the units |08, |99 and H0 respectively. It will beunderstood that when sumping is to be effected, the stem ||3 will beoperated to cause the unit ||0 to supply uid to the conduit B9, whilethe conduit 88 is vented to the return line 95. When upswing is to beeected, the unit |09 will eiect the supply of fluid to the conduit 9|.When retraction is to be eiected, conduit 89 will be vented and theconduit 88 supplied with iiuid by the unit H0. During transport, theunit |08 will elect the supply of fluid to cylinder and piston mechanism6 One more point might be mentioned; namely, that the supply box |02 isprovided with a relief valve I5 and the units are so constructed as topermit free now-through of pressure between the conduits |0| and 95 whennone of the units |08, |09 and ||0 is eiecting fluid supply to thecylinder and piston mechanism which it controls.

No further detailed description of the structure or mode of operation ofthe invention appears to be necessary. Starting with the parts in theposition shown in Fig. 10, the disintegrating mechanism and the pushermechanism will be advanced to the right through the action of thesumping and withdrawing cylinders 85. The disintegrating mechanism willbe then swung upwardly to the position shown at Fig. 9, and the pushermechanism will be advanced to the position shown in that figure. Thewidth of this mechanism will be made such that it will not interferewith any uncut portion of a face, or, if desired, it may be made narrowenough so that it lies wholly within the width of the disintegratingmechanism, with the result that there could be no interference with anyuncut ribwhether a side rib or a rib bounding one of the vertical bandswhich are successively cut out. After the upswing disintegratingoperation has been completed, the cylinders will retract the wholeapparatus, thus removing the relatively small ridge of coal at X in Fig.9, and the pusher being retracted from its extended position. Thedisintegrating apparatus will then be swung down, with simultaneousretraction of the pusher; and the disintegrating apparatus, as itreaches its lowered position, Will clean up most of the material whichlies beneath it as a result of a prior operation of the pusher mechanismduring the removal of a previous vertical strip of coal across the face.

It will be evident that the apparatus is simple, eifective, fullyprotected from self-damage, and automatic, or at least semi-automatic,in its operation.

While there is in this application specifically described one form whichthe invention may assume in practice, it will be understood that thisform of the same is shown for purposes of illustration, and that theinvention may be modined and embodied in various other forms withoutdeparting from its spirit or the scope of the appended claims.

What I claim is:

l. In combination, a base, an elongated disintegrating apparatus, meansswingably supporting said elongated disintegrating apparatus on saidbase for movement up and down in upright planes, a material pushingdevice, means supporting said material pushing device on said base forreciprocatory movement in the planes of swing of said disintegratingapparatus and in a path to which the swing of said disintegratingapparatus is transverse, and means controlled by the swing of saiddisintegrating apparatus and including mechanism connecting saidapparatus and said device for transmitting movement from the former tothe latter for retracting said device aeefifere 9 'assaid disintegratingapparatus "makes its downswing. f

`2. In'combination, a base, a carriage, recipro- 'cably `supported onsaid base, a ldisintegrating apparatus pivotally supported on saidcarriage for swinging .movement upwardly and .down- Wardly relativetheretoin vertical planes, guideways on `said carriage disposedsubstantially horizontal, a pusher element for moving material overagenerally horizontal surface, said .pusher element having supportingmeans slidably guided by said guideways, an arm connected with said'disintegrating apparatus and swung as the latfter moves upwardly anddownwardly, a link-pivotally connected to said slidable supportingmeans, and a pivotal connectionbetween said link fand said arm at apointin the latter offset from its axis of swing.

3. In combination, `a `trame, a disintegrating apparatus, means forpivotally supporting said disintegrating.apparatus on saidframe forswinging relative to the latter on a horizontal axis between lowered andraised positions, power means for swinging said disintegrating apparatusfrom said lowered to said raised position, guideways on said framedisposed generally horizontal, a pusher element guided by said guidewaysfor moving material over a subjacent surface in a generally horizontalpath relative to which said disintegrating apparatus is swingablevertically and into a portion of which said disintegrating apparatus islowered by downward swing about said horizontal axis, and means foradvancing said pusher element through said path and retracting it insynchronism with the swing of said disin. tegrating apparatus by forcesderived from the movement of the latter and for preventing said pusherelement and said disintegrating apparatus from being simultaneously insaid portion of said path, said last mentioned means including mechanismenergized by the swing of said disintegrating apparatus forreciprocating said pusher element.

4. The combination dened in claim 3 in which means is provided forpivotally supporting said guideways on said frame and in which there isfurther provided means for swinging said guide- Ways angularly upwardlyrelative to said frame about their pivotal support on the latter.

5. The combination defined in claim 3 in which said mechanism energizedby the swing of said disintegrating apparatus includes a link pivotallyconnected with said dis-integrating apparatus at a point which liesbeneath said horizontal axis when said disintegrating apparatus is inlowered position, and which link is pivotally connected with said pusherelement.

6. In combination, a base, a disintegrating apparatus, means swingablysupporting said disintcgrating apparatus on said base for movement upand down relative to said base in upright planes, a material pushingdevice, means supporting said material pushing device on said base forhorizontal movement relative to the latter, in the planes of swing ofsaid disintegrating apparatus, over a subjacent level surface over whichmaterial is to be moved by said pushing device, and mechanismoperatively connecting said disintegrating apparatus and said pushingdevice and actuated by said disintegrating apparatus during movementthereof for automatically advancing said device as said disintegratingapparatus is swung upwardly and for reti-acting said device as saiddisintegrating apparatus is swung downwardly and precluding theperformance of :itsrespective movement'by 'either said device or saidapparatus while the other is'stationary'.

'7. Infcombination, 'a base, a-'disintegrating apparatus swingablysupported thereon for up and down movement in upright planes, a`material pushingy device, means including guides sri-.pported by saidbase guidingsaid pushing device for horizontal movement, in the planes'oi swing of said disintegrating apparatus, vover ahorizcntal surfacealong which material 'is to be moved by said pushing device, and meansincluding linkmeans pivotally connected to one of the saiddisintegrating apparatus and said material pushing device andavpivot-,pin connected tothe other thereof Aand to which said link meansis pivotally connected, ifcr automatically advancing said devicehorizontally as said disintegrating apparatus is swung 'upwardly andretracting said device as said disintegrating apparatus is swungvdownwardly. y

8.1In combination, abasea disintegrating Aapparatus, means supported "onsaid base pivotally supporting said disintegrating apparatus formovement in upright planes, a material pushing device, means supportingsaid material pushing device upon said base for movement in at leastsome of the planes of said disintegrating apparatus, said supportingmeans for said disintegrating apparatus and for said material pushingdevice supporting them, respectively for movement up and down andhorizontally back and forth, in overlapping paths, and means for movingsaid disintegrating apparatus and said material pushing device so thateach performs its function without interference with the other at theoverlapping portion of said paths, said means including a push-pullconnection for synchronizing the motion of said disintegrating apparatusand said material pushing device so that each moves away from theoverlapping portion of said paths as the other moves towards suchportion.

9. In combination, in a mining apparatus, a base, a carriagereciprocably supported on said base, a disintegrating apparatuspivotally supported on said carriage for swinging movement relativethereto in vertical planes, horizontal guideways on said carriage, apusher element for moving material over a mine floor having supportingmeans slidably guided by said guideways, an arm movable with saiddisintegrating apparatus, a link pivotally connected to said slidablesupporting means, a pivotal connection between said arm and link at apoint below and at one side of the pivot of said disintegratingapparatus when the latter is in lowered position and below and at theother side of such pivot when said disintegrating apparatus is raised,and means for reciprocating said carriage.

l0. In combination, in a mining apparatus, a base, a carriagereciprocably supported on said base, a disintegrating apparatuspivotally supported on said carriage for up and down swinging movementrelative thereto in vertical planes, elongated horizontal guideways onsaid carriage, means for supporting said guideways for tiltingadjustment about a horizontal axis relative to which said guidewaysextend substantially radially, means for adjusting said guideways aboutsaid horizontal axis, a pusher element having supporting means slidablyguided by said guideways and movable back and forth to move materialover a subjacent mine floor, an arm movable with said disintegratingapparatus, a link pivotally connected to said slidable supporting means,and a pivotal connection between said arm and link.

11. In combination, a base, a disintegrating apparatus, means supportingsaid disintegrating apparatus on said base for swinging movement,

including movement through a horizontal-position, in upright planes, amaterial pushing device, means supporting said material pushing deviceupon said base for movement in the planes of swing of saiddisintegrating apparatus, in a path (a) offset vertically from saiddisintegrating apparatus when the latter is in a horizontal position and(b) substantially perpendicular to the instantaneous direction ofmovement of said disintegrating apparatus when the latter is passingthrough a horizontal position, and means for advancing said device assaid disintegrating apparatus makes its swing in said upright planesaway from the path of movement of said material pushing device and forretracting said device as said disintegrating apparatus makes its swingtowards the path of movement of said material 12 pushing device, saidmeans including mechanism converting the swinging motion of saiddisintegrating apparatus to a reciprocating motion and transmitting thelatter to said material pushing device.

References Cited in the le of this patent UNITED STATES PATENTS NumberName Date 1,449,088 Burnell Mar. 20, 1923 1,510,490 Muehlhauser Oct. 7,1924 1,570,829 Forsyth Jan. 26, 1926 1,588,563 Wilson June 15, 19261,884,946 Wineman Oct. 25, 1932 1,905,472 Kraft Apr. 25, 1933 1,917,368Hauge July 11, 1933 2,269,781 Osgood Jan. 13, 1942 FOREIGN PATENTSNumber Country Date 316,292 Germany Nov. 24, 1919

